 * {margin: 0; padding: 0;box-sizing: border-box; overflow: hidden; }
html, body {background-color: #EEEEEE;  height: 100%; }
html {overflow: hidden;}
body { overflow: auto; width: calc(100vw + 20px);}
#header{overflow: hidden;width: 100%;}
#logo{height:80px;width:100%;background-color:#337AB7;overflow: hidden;}

#logo img{margin-top: 10px;margin-left: 70px;}

#logo b{float: right;margin-right: 100px;line-height: 80px;color: #fff;}

#nav_menu{background-color:#2E3340;font-size: 14px;color:#CCCCCC;height:50px;width:100%;}
#nav_menu a{color: #B6B4B6;text-decoration:none;}
#nav_menu a:hover{color:#FDFAFA;}
#nav_menu ul{width:80%;height:50px;list-style-type:none;overflow: hidden;}

#nav_menu ul li{float:left;width:12%;line-height:50px;text-align:center;overflow:hidden;}

#left_menu{width:20%;float:left;background-color:#EEEEEE ;}
#left_menu a{color:#2E3340;text-decoration:none;}
#left_menu a:hover{color:#000000;text-decoration:underline;}
#iframe_content{float:left;width:80%;}

#footer{background-color: #111D31;height:80px}
/*显示图片的内容区,大小刚好等于图片的大小*/
.img-scroll{ position: relative;height:450px;}

/*上下一张按钮,样式随意控制*/
.img-scroll>button{	display:none; position:absolute; top:50%;
				margin-top:-22px; width:48px; height:48px;
				border-radius:50%; border:3px solid #eee;
				outline:none;color:#eee;font-size:30px;font-weight:bold;
				background-color:rgba(0,0,0,.3);cursor:pointer;}
				
.next{right: 0px;}
.prev{left:0px}

/*有多少张图片,就把宽度设为内容区宽度*图片数量,让所有图片排成一横排,*/
.img-content{}

/*装每张图片的div*/
.img-content>div{float:left;}

.img-content img{height:450px;width:100%;}

.arc-list{position: absolute;bottom: 0; }

.arc-list>li{	display: inline-block;width: 15px;height: 15px;border-radius: 50%;
				list-style-type: none;background-color: rgba(0,0,0,.5);}			
#product ul{font-size: 16px;color:#2E3340;list-style-type:none;}
#product ul li{margin: 10px 20px;} 
#product h3 {background-color: #337AB7;padding: 7px 20px;color: #FDFAFA;}
#contact_us p{font-size: 14px;color:#2E3340; margin:10px 20px;}
#contact_us h3{background-color: #337AB7;padding: 7px 20px;color: #FDFAFA;}
